condition mean min max ZT0-3 54.583349999999996 54.583349999999996 54.583349999999996 ZT4-7 48.78645 48.78645 48.78645 ZT8-11 27.22045 27.22045 27.22045 ZT12-15 24.835549999999998 24.835549999999998 24.835549999999998 ZT16-19 39.129000000000005 39.129000000000005 39.129000000000005 ZT20-23 52.34405 52.34405 52.34405